cwarn-is-enabledcwarn-is-enabled is a compiled Lisp function in `
cwarn.el'. (cwarn-is-enabled MODE &optional FEATURE) Non-nil if CWarn FEATURE is enabled for MODE. FEATURE is an atom representing one construction to highlight. Check if any feature is enabled for MODE if no feature is specified. The valid features are described by the variable `cwarn-font-lock-feature-keywords-alist'.